Answer:
There are several evidence that show rise in global temperature.
Explanation:
Thermometer readings
Ongoing temperature recordings using thermometers are showing a clear warming of the earth's temperature over past few decades.
Glacier retreat
Over the past 50 to 100 years, photographic evidence has shown that the world's glaciers have been melting, which has caused them to retreat. The increase in global temperatures is causing glaciers to disappear and is increasing the melting of sea ice in artic.
Ice cores
scientists often use ice cores to detect changes in temperatures. When snow falls it traps air into the ice. When scientists take a sample of ice it reveals the atmospheric gas concentrations at the time the snow fell. This is used to calculate temperature of each year.
Early spring and Rising sea levels are also the evidence of global warming.
