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BBC – Future – Science & Environment – Sucking CO2 from the skies with artificial trees
It may be a colourless, odourless and completely natural gas, but carbon dioxide is beginning to cause us a lot of problems. It only makes up a tiny fraction of the atmosphere (0.04% of all the gas by volume – or 395 parts per million) but it has a huge effect on the Earth’s temperature. That’s because unlike nitrogen or oxygen, carbon dioxide molecules absorb the Sun‘s heat rays even though they let light rays pass through, like a greenhouse.
Scientists are looking at ways to modulate the global temperature by removing some of this greenhouse gas from the air. If it works, it would be one of the few ways of geoengineering the planet with multiple benefits, beyond simply cooling the atmosphere.
Every time we breathe out, we emit carbon dioxide just like all other metabolic life forms. Meanwhile, photosynthetic organisms like plants and algae take in carbon dioxide and emit oxygen. This balance has kept the planet at a comfortably warm average temperature of 14C (57F), compared with a chilly -18C (0F) if there were no carbon dioxide in the atmosphere.
In the Anthropocene (the Age of Man), we have shifted this balance by releasing more carbon dioxide than plants can absorb. Since the industrial revolution, humans have been burning increasing amounts of fossil fuels, releasing stored carbon from millions of years ago. Eventually the atmosphere will reach a new balance at a hotter temperature as a result of the additional carbon dioxide, but getting there is going to be difficult.
via BBC – Future – Science & Environment – Sucking CO2 from the skies with artificial trees.
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Earth Day 2011 – A Billion Acts of Green
This year’s Earth Day theme is Billion Acts of Green®. The purpose of this theme is to mobilize one billion acts of environmental service around the world. The campaign calls for people of all nationalities to commit to an act that helps reduce carbon emissions and promotes sustainability. The act can be a simple gesture, such as washing laundry in cold water, or immense, like picking up a million pounds of trash. Whatever the act may be, Earth Day is a great time to generate as many as possible in your community. Collectively, these acts will not only have an impact on global carbon emissions, but will also demonstrate the power of small every-day individual acts of green.
Earth Day 2011 Theme: Billion Acts of Green®
What are people doing to help the environment?
Strange Random Environment Quote:
There’s so much pollution in the air now that if it weren’t for our lungs there’d be no place to put it all. – Robert Orben
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