Whois & Analysis for worldometers.info

Carbon dioxide (chemical formula CO2) is a colorless and odorless gas that is vital to life on Earth.

This naturally occurring chemical compound is made up of a carbon atom covalently double bonded to two oxygen atoms.

Carbon dioxide exists in Earth's atmosphere as a trace gas at a concentration of about 0.04 percent (400 ppm) by volume.

Natural sources include volcanoes, hot springs and geysers, and it is freed from carbonate rocks by dissolution in water and acids.

Because carbon dioxide is soluble in water, it occurs naturally in groundwater, rivers and lakes, in ice caps and glaciers and also in seawater.

It is present in deposits of petroleum and natural gas.

In demographics, the world population is the total number of humans currently living.

As of March 2017, it was estimated at 7.49 billion.

The United Nations estimates it will further increase to 11.2 billion in the year 2100.

The U.S. and World Population Clock presents the United States Census Bureau's continuously active approximations of both the population of the United States and the world's total population.

The population totals are based on the latest census information and national population estimates, which are used in the algorithms that run the two clocks.

Economics (UK English,; US English) is "a social science concerned chiefly with description and analysis of the production, distribution, and consumption of goods and services" according to the Merriam-Webster Dictionary.

The discipline was renamed in the late 19th century primarily due to Alfred Marshall from "political economy" to "economics" as a shorter term for "economic science" at a time when it became more open to rigorous thinking and made increased use of mathematics, which helped support efforts to have it accepted as a science and as a separate discipline outside of political science and other social sciences.

Malnutrition or malnourishment is a condition that results from eating a diet in which nutrients are either not enough or are too much such that the diet causes health problems.

It may involve calories, protein, carbohydrates, vitamins or minerals.

Not enough nutrients is called undernutrition or undernourishment while too much is called overnutrition.

Malnutrition is often used to specifically refer to undernutrition where an individual is not getting enough calories, protein, or micronutrients.

If undernutrition occurs during pregnancy, or before two years of age, it may result in permanent problems with physical and mental development.

Extreme undernourishment, known as starvation, may have symptoms that include: a short height, thin body, very poor energy levels, and swollen legs and abdomen.

People also often get infections and are frequently cold.

The symptoms of micronutrient deficiencies depend on the micronutrient that is lacking.