These bacteria are found in the soil and combine oxygen with ammonia to form nitrates that are the form of nitrogen that green plants can absorb by their root cells as nutrients.

Los __________ establecen la estrategia general de la empresa.

What is the study of the solid, liquid and gas matter of the Earth?

Which is NOT TRUE of lead air pollution?

Which country contributed the most carbon dioxide emissions in 2014?

As water evaporates it stores heat and this stored heat is called _______ which can be released to the atmosphere or space.

Which greenhouse gas is the most abundant and could reach 500 ppm by 2100?

¿Qué es un cheque al portador?

Los _________ son los supervisores directos de los obreros.

Which is NOT TRUE of sedimentary rock?