The only meaningful solution in the long term is to drastically reduce carbon emissions worldwide.
They are an essential part of the solution for reducing greenhouse-gas emissions worldwide.
Ninety companies are responsible for two-thirds of recorded greenhouse gas emissions worldwide.
The Kyoto protocol is an international and legally binding agreement to reduce greenhouse gas emissions worldwide.
Deforestation currently contributes about a fifth of carbon dioxide emissions worldwide.
International cooperation and agreements will be necessary to reduce carbon dioxide emissions worldwide.
A 2013 study showed that just 90 companies, including Exxon and BP, were responsible for two-thirds of the manmade emissions worldwide.
Farmed ruminant animals, including cattle and sheep, are thought to be responsible for up to a quarter of "man-made" methane emissions worldwide.
Cities represent three quarters of energy consumption and 80% of CO2 emissions worldwide, and represent the largest of any environmental policy challenge.
A 2005 report from the World Bank warned that if China built incinerators rapidly and did not limit their emissions, worldwide atmospheric levels of dioxin could double.
