D. one experiment is performed but the scientists control the variables
Answer:
External factors can be described as factors which give rise to a situation from outside. Internal factors bring a change or give rise to a situation from internal conditions.
<u>External Factors:
</u>
<em>Temperature of food storage during processing.
</em>
<em>Humidity of the storage environment
</em>
<em>Presence of gases, such as CO2, during packaging
</em>
<em>Preservatives, such as salt and sugar
</em>
<em>Handling of food by manufacturers
</em>
<u>Internal Factors:
</u>
<em>pH of the food
</em>
<em>Presence of antimicrobial compounds
</em>
<em>Nutrient content (Such as vitamins and minerals)
</em>
<em>Moisture content or water activity
</em>
<em>Protective structure of food, such as feathers, hide and skin</em>
1.Burning fossil fuels
When we burn fossil fuels like coal, and gas to create electricity or power our cars, we release CO2 pollution into the atmosphere.
Australians are big producers of CO2 pollution compared to the rest of the world. Our level of CO2 pollution per person is nearly double the average of other developed nations and more than four times the world average.
Electricity generation is the main cause of carbon pollution in Australia as 73% of our electricity comes from burning coal and 13% from burning gas. The remaining 14% comes from renewable energy sources such as hydro, solar and wind, which do not emit carbon.
Reducing the amount of electricity generated from coal and gas, and increasing the amount of electricity from clean, renewable energy sources like solar and wind, means less carbon pollution is emitted. This is one of the main ways we can address global warming.
Deforestation
Plants play an important role in regulating the climate because they absorb carbon dioxide from the air and release oxygen back into it. Forests and bushland act as carbon sinks and are a valuable means of keeping global warming to 1.5°C.
But humans clear vast areas of vegetation around the world for farming, urban and infrastructure development or to sell tree products such as timber and palm oil. When vegetation is removed or burnt, the stored carbon is released back into the atmosphere as CO2, contributing to global warming. Up to one-fifth of global greenhouse gas pollution comes from deforestation and forest degradation.Global warming, population growth, and natural resources for food production. PIP: Destruction of forests and the considerable burning of fossil fuels is directly causing the level of carbon dioxide and other greenhouse gases including methane, carbon monoxide, and nitrous oxide in the atmosphere to rise.
2.Global warming, population growth, and natural resources for food production. PIP: Destruction of forests and the considerable burning of fossil fuels is directly causing the level of carbon dioxide and other greenhouse gases including methane, carbon monoxide, and nitrous oxide in the atmosphere to rise.
3.Replace Regular Incandescent Light bulb, Drive less or carpool Reduce, Reuse, Recycle Go sola, use less hot water and many more.
Answer:, microorganisms whose action results in the conversion of nitrates in soil to free atmospheric nitrogen, thus depleting soil fertility and reducing agricultural productivity.
Explanation:
Appalachian: Two continents colliding.
North American Cordillera: Terrane accretion
Aleutian plate: Oceanic convergence
Andes mountain range: An oceanic plate and continental plate colliding.
