The higher the concentration of greenhouse gases like CO₂ and methane, the lower the temperatures on Earth. True
False

False

Explanation:

The increase of methane and Carbon dioxide helps trapping the heat inside Earth's atmosphere, temperature increases and this leads to global warming

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.