Cut air pollution to fight climate change
(World News Science)

When scientists talk about cutting down greenhouse gases that are blamed for warming the planet, they are mainly targeting carbon dioxide (CO2). That is because it amounts to nearly two-thirds of emissions and can stay in the atmosphere for thousands of years. Last year, it reached 411 parts per million (ppm) at Hawaii`s Mauna Loa Atmospheric Baseline Observatory, the highest monthly average ever recorded. Some experts say 350ppm is the safe limit while others argue 400ppm should be the reasonable target. Burning of fossil fuels, wood and solid waste leads to CO2 emissions. Some industrial processes and land-use changes, including deforestation, also lead to emission of this major greenhouse...