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[106] [107] In tropical grasses, including maize, sorghum, sugarcane, Bermuda grass and in the dicot amaranthus, leaf photosynthetic rates were around 38−40 μmol CO 2 ·m −2 ·s −1, and the leaves have two types of green cells, i.e. outer layer of mesophyll cells surrounding a tightly packed cholorophyllous vascular bundle sheath cells.
Forest area net change rate per country in 2020. Deforestation is defined as the conversion of forest to other land uses (regardless of whether it is human-induced). [14] Deforestation and forest area net change are not the same: the latter is the sum of all forest losses (deforestation) and all forest gains (forest expansion) in a given period ...
Deforestation is a primary contributor to climate change, [1] [2] and climate change affects the health of forests. [3] Land use change , especially in the form of deforestation, is the second largest source of carbon dioxide emissions from human activities, after the burning of fossil fuels .
In May 2020, the European Union published its Biodiversity Strategy for 2030. The biodiversity strategy is an essential part of the climate change mitigation strategy of the European Union. From the 25% of the European budget that will go to fight climate change, large part will go to restore biodiversity [210] and nature based solutions.
The documentary is a follow-up to Attenborough's Climate Change – The Facts (2019). [3] It premiered on 13 September 2020 on BBC One at 8 p.m. [ 4 ] [ 5 ] The audience peaked at an estimated 4.5 million viewers; BBC commissioner Jack Bootle reported that viewership rose by 600,000 over the course of the program.
Scientists thought that Lake Enigma was frozen from top to bottom. Then they discovered that water—and mysterious lifeforms—existed 11 meters below the surface.
OCA2 produced melanocytes, or melanin producing cells. Melanin is the protein that creates skin, eye and hair color. More melanin means darker eyes, hair or skin.
At a cellular level, there appear to be two main types of eyes, one possessed by the protostomes (molluscs, annelid worms and arthropods), the other by the deuterostomes (chordates and echinoderms). [24] The functional unit of the eye is the photoreceptor cell, which contains the opsin proteins and responds to light by initiating a nerve impulse.