Carbon dioxide is a greenhouse gas that contributes to global warming. Calculate your household’s carbon footprint and discover ways to reduce your carbon output.

This infographics module reveals the origins of oil, its journey from well to wheel, and the total-cycle environmental impact of the process.

Cutaway of a circular saw powered by a next-generation nanophosphate lithium-ion battery. These batteries are said to recharge in minutes rather than hours, have ten times the life cycle and double the capacity of current rechargable batteries.

Cutaway of the controversial electronic neuromuscular incapacitation weapon blamed for more than 350 deaths in North America. (Source: Amnesty International)