Questions

72% of the totally emitted greenhouse gases is carbon dioxide.

Hence, Carbon dioxide (Co2) is predominantly responsible for Global warming.

We know that, Elements in the same group of the periodic table have similar characteristics.

Here Magnesium and Strontium shared some similar properties because they both belong to the same group. Sr is the chemical symbol for strontium which is a group two element; it has atomic number of 38. 

Gross domestic product (GDP) is the monetary value of all the finished goods and services produced within a country's borders in a specific time period.

Simply, GDP is a broad measurement of a nation’s overall economic activity. 

It is calculated by summation of Consumption, investment, government purchases, and net exports.

A skid happens whenever the tires lose their grip on the road. Braking skids occur when the brakes are applied so hard that the front or rear wheels lose traction.