Climate Questions: What are the sources of emissions?

By SIBI ARASU
Associated Press

BENGALURU, India (AP) — Greenhouse gases, like carbon dioxide, methane, nitrous oxide and fluorinated gases are all hotting up the planet. But where do they come from? The main human activity that spews out these gases is energy — heating up or cooling homes or keeping the lights on. Agriculture is another major factor. Despite recent efforts to slow and even stop our dependency on fossil fuels, human-cause emissions are on the rise. Scientists say the trend needs to be reversed.