Fifty of the world’s 500 largest companies are responsible for nearly three quarters of the group’s 3.6 billion metric tons of greenhouse gas (GHG) emissions, according to the CDP Global 500 Climate Change Report 2013.
Most of the top 50 carbon-polluting companies operate in the energy, materials and utilities sectors, the report says. The carbon dioxide emitted by these companies has risen by 1.65 percent to 2.54 billion metric tons over the past four years — equivalent to adding more than 8.5 million pickup trucks to the streets.