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Anthropogenic Climate Change
Climate Change in Context
Earth’s climate has always changed naturally through glacial and interglacial cycles, driven mainly by orbital variations Milankovitch cycles.
Over the past 650,000 years, there have been seven cycles of glaciation and retreat, with the last Ice Age ending about 7,000 years ago, marking the beginning of the Holocene—a relatively stable climate period that allowed human civilization to flourish.

Climate change refers to a change of climate that is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and is in addition to natural climate variability observed over comparable time periods.

Since the mid-20th century, the global climate has been warming at an unprecedented rate over decades to millennia.
IPCC reports conclude that it is extremely likely 95% probability that this trend is driven by human activities rather than natural causes.
This is referred to as anthropogenic human-induced climate change.

Main Cause: The Enhanced Greenhouse Effect
The natural greenhouse effect keeps Earth warm enough for life +15°C instead of –18°C.
Human activities are intensifying this process by adding more greenhouse gases GHGs into the atmosphere, trapping excess heat.

This enhanced greenhouse effect is the key driver of global warming and associated climate changes.