<span>Almost half of Russia's land is steppes.</span>
<u>Physical geography</u> is the study of the natural features, processes and patterns that occur on the Earth's surface.
Answer:
Green house effect and human activity.
Explanation:
-The green house effect: Some gases in the atmosphere trap the heat and doesn't allow it to scape making the Earth warmer.
-Human activity: The industrial activities have increased the carbon dioxic levels that have contributed to the higher temperatures. Also, deforestation, fluorinated gases and fertilisers containing nitrogen have contributed to climate change.