A forest is an area of land dominated by trees. Forests are the largest terrestrial ecosystem of Earth by area, and are found around the globe. Forests account for 75% of the gross primary production of the Earth's biosphere, and contain 80% of the Earth's plant biomass. Forests form distinctly different biomes at different latitudes and elevations, and with different precipitation and evapotranspiration rates. Deforestation threatens many forest ecosystems. Deforestation occurs when humans remove trees from a forested area by cutting or burning, either to harvest timber or to make way for farming. Most deforestation today occurs in tropical forests. The vast majority of this deforestation is because of the production of four commodities: wood, beef, soy, and palm oil.
圖片編號:
298691990
拍攝者:
Natureheart
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授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
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標準授權 | XS | 480 x 320 | JPG | 13 | |
標準授權 | S | 800 x 533 | JPG | 15 | |
標準授權 | M | 2121 x 1414 | JPG | 18 | |
標準授權 | L | 2738 x 1825 | JPG | 20 | |
標準授權 | XL | 3464 x 2309 | JPG | 22 | |
標準授權 | MAX | 5184 x 3456 | JPG | 23 | |
標準授權 | TIFF | 7331 x 4888 | TIF | 39 | |
進階授權 | WEL | 5184 x 3456 | JPG | 88 | |
進階授權 | PEL | 5184 x 3456 | JPG | 88 | |
進階授權 | UEL | 5184 x 3456 | JPG | 88 |
XS
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XL
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標準授權 | 480 x 320 px | JPG | 13 點 |
標準授權 | 800 x 533 px | JPG | 15 點 |
標準授權 | 2121 x 1414 px | JPG | 18 點 |
標準授權 | 2738 x 1825 px | JPG | 20 點 |
標準授權 | 3464 x 2309 px | JPG | 22 點 |
標準授權 | 5184 x 3456 px | JPG | 23 點 |
標準授權 | 7331 x 4888 px | TIF | 39 點 |
進階授權 | 5184 x 3456 px | JPG | 88 點 |
進階授權 | 5184 x 3456 px | JPG | 88 點 |
進階授權 | 5184 x 3456 px | JPG | 88 點 |