- 20 Aug 2019 12:33
#15027914
Sure, it is multifactorial. However, you obviously did not learn basic plant biology in grade school.
Green leaves use energy from sunlight through photosynthesis to chemically combine carbon dioxide drawn in from the air with water and nutrients tapped from the ground to produce sugars, which are the main source of food, fiber and fuel for life on Earth. Studies have shown that increased concentrations of carbon dioxide increase photosynthesis, spurring plant growth.
However, carbon dioxide fertilization isn’t the only cause of increased plant growth—nitrogen, land cover change and climate change by way of global temperature, precipitation and sunlight changes all contribute to the greening effect. To determine the extent of carbon dioxide’s contribution, researchers ran the data for carbon dioxide and each of the other variables in isolation through several computer models that mimic the plant growth observed in the satellite data.
https://www.nasa.gov/feature/goddard/20 ... ning-earth
Pants-of-dog wrote:@Julian658
Your source says that the Earth is greener than it was twenty years ago, and that this is due to forestation projects and agriculture.
It does not say that the Earth is greener since we have started burning fossil fuels and that this use of fossil fuels is the cause of the rise in foliage.
Sure, it is multifactorial. However, you obviously did not learn basic plant biology in grade school.
Green leaves use energy from sunlight through photosynthesis to chemically combine carbon dioxide drawn in from the air with water and nutrients tapped from the ground to produce sugars, which are the main source of food, fiber and fuel for life on Earth. Studies have shown that increased concentrations of carbon dioxide increase photosynthesis, spurring plant growth.
However, carbon dioxide fertilization isn’t the only cause of increased plant growth—nitrogen, land cover change and climate change by way of global temperature, precipitation and sunlight changes all contribute to the greening effect. To determine the extent of carbon dioxide’s contribution, researchers ran the data for carbon dioxide and each of the other variables in isolation through several computer models that mimic the plant growth observed in the satellite data.
https://www.nasa.gov/feature/goddard/20 ... ning-earth