What are the main reasons and sources of the increased co2 levels?

how have levels of carbon dioxide in the atmosphere changed in the past 100 years? give specific quantities from pre-industrial revolution compared to now.

The biome that includes evergreen trees is the forest biome.

Hurry! according to the map above, there are major types of natural resources in india. a. 4 b.5 c.10 d.16

Extensive and unusual cold snaps have occurred here recently. is this evidence that global warming is lessening or not occurring? no—although the long-term trend is for warming, short-term weather patterns can still be variable. no—melting of glaciers and ice caps is making the oceans cooler, which can cause cold snaps. yes-- if global warming really were occurring, cold snaps wouldn’t happen. yes—due to global warming, weather patterns should be become less—not more—variable.