Author Archives: francisco lai liang

Advertising Space: Is The Privatization of Space Exploration Good?

SpaceX, United Launch Alliance, and Lockheed Martin, if you are a space fan, then you’ve probably heard these names. After a long hiatus on space exploration since the Apollo missions, new leaders have emerged, but this time is not just NASA. In recent years, multiple new private space companies have popped up and taken the space sector by surprise. But we have to ask ourselves, is space privatization good?

United Launch Alliance’s ATLAS V rocket carrying NASA’s Curiosity Rover- picture by NASA

Private space companies operate on a for-profit platform, which can lead to exploitation of space. Due to lack of regulations, these space companies have lots of freedom when it comes to their operations in space. This allows them for the exploitation and monopolization of resources in space.

These companies are also very secretive of their inside functions. New innovations from these companies are confidential and isn’t publicly available. Consider this, NASA’s Hubble space telescope imaging system is publicly available, and has found use in early breast cancer imaging. Imagine if such intellectual property was not publicly available and kept as a company secret. The secretiveness of these companies could severely impede the advancement of science.

Privatization of space also comes with lots of benefits. Some of these benefits are the re-spark in popularity of space exploration and the plummeting cost of transport.

As NASA shifted focus away from space exploration, it has pawned off majority of its responsibilities to the private aerospace sector. These private companies are incredibly efficient compared to NASA. Government agencies such as NASA require funding from taxpayers, their budget and goals are constantly changing every new election cycle.

Rendering of NASA’s mars rocket, Ares V, which was cancelled by the US government in 2011- photo by NASA

Private companies can set long term goals and also have a stable source of funding. This and the profit driven nature of companies, has allowed them to excel in the industry and significantly drive the cost down. The cost of transporting supplies into low earth orbit costed around $20,000 per kilogram in the 1970s (around $100,000 today) and today the cost is only around $2,000 per kilogram.

SpaceX’s reusable rockets have dramatically decreased the cost of rocket launches- photo by SpaceX

Along with decrease in launch prices, the public interest in space has also been growing. Recently space is becoming more popular likely due to the emergence of these companies. For example, SpaceX’s ambitious goals to reach mars by 2022 has led popularity in space to an all time high since the Apollo missions. This increase in excitement for space can potentially also influence government into allocating more resources for space exploration.

I am okay with the privatization of space, as long as humanity becomes a multi planetary society. New regulations should be placed on these companies so they are held accountable for their operations in space. If all works out, hopefully one day I can pack up my bags and take a vacation to mars.

Diversity in Forests Increase Carbon Absorption

A new study in China, shows that a mix of trees can absorb twice as much carbon from the atmosphere than forests consisting of a single species.

A joint research study involving scientists from China, Switzerland and Germany, explored the effects of polyculture of trees in forests. In 2009, researchers replanted large patches of deforested areas in Jianxi province, with up to 16 different species of plants, totaling at 150,000 trees.

Plants grow by photosynthesis, requiring water, sunlight and carbon dioxide. Plants use the carbon in carbon dioxide as a building block for their structures. As a forest grows, plants trap carbon dioxide, helping mitigate the effect of greenhouse gases. This is greatly beneficial towards us, since a by-product of this process is lumber, which has a widespread of applications.

Scientists allowed the patches of cultivated forests to grow over the span of 9 years. After this maturation stage, scientists cut down 100 trees to determine the amount of carbon absorbed by the trees via biomass analysis. A staggering 47% percent of mass of the branches and trunks was carbon, vastly outperforming traditional monoculture forests. “The study shows that forests are not all the same when it comes to climate protection – monocultures achieve not even half of the desired ecosystem service,” said Bernhard Schmidt from the department of biology at the University of Zurich.

multi-species forests (left) vs. single-species forests (right)- made by me, data from Yuanyuan Huang et al.

Scientists believe that this increase in carbon absorption productivity is due the increase in plant density. Planting shrubs in the forest floor increases the plant density greatly. Taller trees receive the most sunlight, shrubs and other lower lying vegetation are accustomed to the shade of larger trees, allowing them to grow and store carbon with less sunlight.

This new research is important in combating global warming. Monoculture planting of trees is prolific in the province of British Columbia where logging is common. Planting a variety of plants will greatly increase the forest’s efficiency to absorb carbon dioxide. Increasing plant diversity also has other benefits, such as a more robust ecosystem. Increased plant diversity increases resiliency towards pests and diseases.

Pine tree beetles spreading in a forest due to monoculture- photo by Jonhall

This new research is important for all of us, as it is a direct method which we can mitigate global warming. Small change such as planting shrubs after a logging operation can greatly benefit us all. Increasing awareness of this new research can lead to more ecofriendly practices in the industry.

A Hazy Mind: Air Pollution Causes a Decrease in Intelligence

Among the many health hazards that air pollution causes, recent studies in China and Mexico shows a new link between poor air quality and an overall decrease in intelligence.

Air pollution has been well documented to cause harm to our bodies, but its effect on our minds has not been thoroughly researched. These new studies closely tracked the mental states of individuals over the span of years, revealing ground-breaking results in the psychological effects of air pollution.

Masks are used for protection from fine particulates- Courtesy of Arran Smith

A study in China tracked the pollution levels throughout two years and monitored individuals throughout this period. This allowed researchers to obtain a reference point for each individual and looked at their overall mental change.

The study concluded that long exposure to polluted air degraded cognitive functions. People over the age of 64 suffered the largest drop in intelligence, with losing up to one year of education.

Another study, by the Beijing Normal University, tracked sulphur dioxides and nitrogen dioxides levels from 2010-2014 along with the performance of 20,000 students in an arithmetic and language test. The study determined that prolonged exposure to air pollution caused a drop in test scores; with language functions decreasing greater than mathematics.

Beijing is known for poor air quality -Photo by Kentaro IEMOTO on Flickr

A study by the Mexican National Pediatrics Institute, shadowed children and dogs from areas in Mexico with varying levels of air pollution. All the participants of the study were pre-screened for any neurological and cognitive disorders that might affect the results. The participants then underwent brain MRI scans which showed abnormal inflammations in the brains of participants living in polluted areas.

This correlation has not been deeply studied, due to how relatively new these findings are. “The present work presents a ground-breaking relationship between environmental pollution, structural brain alterations and cognitive deficits/delays in healthy children” says in the paper published by the Mexican National Pediatrics Institute

These new findings are crucial to understand the adverse effects of global warming on our brains. Rather than just a correlation, scientists firmly believe it is directly harming our brains. “It is because high air pollution can potentially be associated with oxidative stress, neuroinflammation, and neurodegeneration of humans” says Derrick Ho from the Hong Kong Polytechnic University

This gives us a brief glimpse into our polluted future, as greenhouse gases are rising, exposure to high levels of pollution are affecting more and more individuals. Around 90% of the world already lives in areas where air pollution surpasses the World Health Organization guidelines. The impact of air pollution will greatly affect our quality of life and place a burden on economy due the large effect on the population’s health.