GEOLOGY

Detailed explanation-1: -Earth’s temperatures have never been as high as they are today. Answer C is a LIE. Ice core data shows that Earth’s climate has always changed.

Detailed explanation-2: -Earth’s temperature has risen by an average of 0.14° Fahrenheit (0.08° Celsius) per decade since 1880, or about 2° F in total. The rate of warming since 1981 is more than twice as fast: 0.32° F (0.18° C) per decade.

Detailed explanation-3: -Scientists have resolved a controversial but key climate change mystery, bolstering climate models and confirming that Earth is hotter than it’s been in at least 12, 000 years, and perhaps even the last 128, 000 years, according to the most recent annual global temperature data.

Detailed explanation-4: -Two degrees of warming would bring around 29 additional days of extreme heat, with warm spells enduring for 35 extra days. At 1.5 degrees, 14% of the global population would be exposed to at least one severe heat wave every five years. That rate jumps to 37% if the planet reaches 2 degrees of warming.

Detailed explanation-5: -By studying indirect clues-the chemical and structural signatures of rocks, fossils, and crystals, ocean sediments, fossilized reefs, tree rings, and ice cores-however, scientists can infer past temperatures.