2. Nobody meant it to happen.
But it has, and there's no debate among the
world's scientists about which country is
"most responsible."
The answer: United States has, with China a
distant second.
3. WHAT ARE IT’S CAUSES?
When fossil fuels - coal, oil and natural gas - are burnt
they release CO2 into the atmosphere.
Release of methane gas from arctic tundra and wetlands.
Climate is influenced by natural changes that affect how
much solar energy reaches Earth. These changes include
changes within the sun and changes in Earth’s orbit.
