mosphere In the NO is oxidized to no, which then reacts wi No O2 NO HNO,. That can torm If we wish to prevent the D fine particles acid rain emission of NO x from fuel bustion we cannot capture it as a solid t All high-temperature Rain removes no from the because there are no insoluble processes, such as lightning atmosphere, mostly depositing N salts. Instead we must trikes and combustion form it in the oceans convert it back to N, gas and No by reacting atmospheric N, Microorganisms in the oceans put that back in the and O,. Fossil fuel combustion return it to the atmosphere. atmosphere of gen NH, or n2 n the fuel to no or no jointly called NOx Land (crust and mantl Fossil fuels(gas, oil, coal)are Oceans formed by slow transformation 篷 In the crust and mantle there are no common minerals of the bodies of plants and containing much nitrogen chemically bound nitrogen, believed to be formed from the All nitrates are very water bodies of microorganisms soluble, so that if we deposit a nitrate in the ground, it All plants and animals need small amounts dissolves of n in their diet, to form proteins. Some and plants(legumes)ca use atmospheric nitrogen. Most plants and animals cannot, and rely on fixed nitroge either from lightning strikes or from fertilizer factories Principal fiows of N in the environment. as influenced by humans. The atmosphere is about 78% N2. which is mostly inert and remains in the atmosphere. This figure shows only how the oxidized and reduced compounds of nitrogen are formed, move through the environment, and are converted back to relatively inert N