Carbon dioxide
Carbon dioxide (CO2) is a gas found in low concentrations in Earth’s atmosphere. It enters the atmosphere through the burning of fossil fuels (oil, natural gas, and coal), solid waste, trees, and wood products, and also as a result of other chemical reactions.
Climate is the description of the long-term pattern of weather in a particular area.
Global climate change
Global climate change is change recorded over an extended length of time (decades or longer) with regards to precipitation, temperature, or wind caused by natural and/or manmade factors.
Phenology is the study of the timing of life cycle events in plants and animals. The first appearance of a migratory species, budburst, and onset of hibernation: all these are examples of data that help us better understand the natural world and how it responds to changes in climate. Phenology is literally “the science of appearance.”
Weather includes conditions of the atmosphere over a short period of time.