Global warming, the increased warming of the planet over time, is also known as what?
Global warming is an increase in greenhouse gases that starts to warm the planet above its normal levels. This warming in turn causes the global climate system to start to change - hence, the term climate change. *However, its important to note that these terms are not synonyms but convey slightly different concepts (see here).
The terms have become politicized in some countries, like the U.S. Groups who wish to stress the urgency of action and raise fears will use the term "global warming", while those who want to avoid scare emotions will call it "climate change". Technically, both terms are valid in a scientific sense.