Which of the following was the leading cause of global fossil carbon emissions in 2004?
a. petroleum
b. coal
c. natural gas
d. cement production

The correct answer is option A, Petroleum

Explanation:

In 2004, the majority contribution is pollution was due to the enhanced use of petroleum and fossil fuels because of the  rapid industrial growth & production along with enhanced vehicle ownership. A per an estimate in 2004, U.S. has nearly 314 million metric tons of carbon-equivalent released from  cars and light trucks which is equivalent to coal train 50,000 miles long.

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.