Which of the following is not a result of olimate change partially caused by burning fossil fuels? a. Leaves changing color in the fall months.

An environment's biology includes both abiotic factors like atmosphere, water, soil, sunlight and temperature; and biotic factors which are living components of the ecosystem. These factors lead to a gradual change of an ecosystem over time; however, humans drastically impact the environment through over-exploitation and pollution- we disrupt normal abiotic and biotic interactions. Furthermore, human impact can lead to population die-offs and extinction events, along with food and water scarcity.

Human impact on the environment can manifest as:

overpopulation- natural resources are over used, and habitats cannot support human communities;
urban communities also expand by cutting down trees in deforestation- this leads to erosion and flooding;
burning fossil fuels- this reduces air quality and adds carbon dioxide to the environment leading to global warming;
pollution- adding contaminants to the atmosphere, waterways, soil etc.

Leaves change in the fall via a natural process; in green leaves the photosynthetic pigment, Chlorphyll a is produced in significantly lower amounts. Other pigment molecules that absorb and reflect different wavelengths exist in larger concentrations- their effect is more apparent, leading to visibly orange-red leaves.

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