What’s important is how: largely by adding greenhouse gases to the atmosphere:

And the biggest chunk of CO2, the biggest one, is largely coming from burning fossil fuels:

The combustion of fossil fuels and land-use change for the period 1750–2019 resulted in the release of 700 ± 75 PgC (likely range, 1 PgC = 1015 g of carbon) to the atmosphere, of which about 41% ± 11% remains in the atmosphere today (high confidence). Of the total anthropogenic CO2 emissions, the combustion of fossil fuels was responsible for about 64% ± 15%, growing to an 86% ±14% contribution over the past 10 years. The remainder resulted from land-use change.

A lot of the methane is released during extraction and distribution too.

The fact that it’s fossil fuels, and (to a lesser extent) animal agriculture, means that it’s possible to do something about the problem.