GEOLOGY

Detailed explanation-1: -The oceans have absorbed a massive amount of the extra heat trapped by greenhouse gases in Earth’s atmosphere. Greenhouse gas emissions have increased because of human activities. Even if we stopped greenhouse gas emissions today, the sea level would continue to rise.

Detailed explanation-2: -Why does it matter? As greenhouse gases trap more energy from the sun, the oceans are absorbing more heat, resulting in an increase in sea surface temperatures and rising sea level.

Detailed explanation-3: -Emissions of carbon dioxide, which account for about three-fourths of total emissions, increased by 51 percent over this period.

Detailed explanation-4: -The greenhouse effect: some of the infrared radiation from the Sun passes through the atmosphere, but most is absorbed and re-emitted in all directions by greenhouse gas molecules and clouds. The effect of this is to warm the Earth’s surface and the lower atmosphere.

Detailed explanation-5: -Sea level rise is caused primarily by two factors related to global warming: the added water from melting ice sheets and glaciers, and the expansion of seawater as it warms. The first graph tracks the change in global sea level since 1993, as observed by satellites.