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These environmental risks, rather than any limitations of fossil fuel energy resources, native american tribes full printing christmas ugly sweater are the most significant factors facing the energy sector today.

native american tribes full printing christmas ugly sweater

This can be done directly with fossil fuel taxes or indirectly through mechanisms such as fuel-efficiency standards for motor vehicle fleets and green energy requirements on electric power systems. native american tribes full printing christmas ugly sweater Nonfossil energy sources circumvent the serious local, regional, and global air pollution problems of fossil fuels, but each holds its own set of limitations and challenges.46 Most available sources of hydroelectric power have already been developed in industrialized countries. A number of developing economies such as China, Nepal, and Brazil have large-scale hydroelectric development programs in progress, but concerns about environmental effects on river systems have slowed these programs’ growth. The growth of nuclear power has slowed in many parts of the industrialized world due to high costs,

public concerns about nuclear wastes, regulatory complications prompted by environmental and safety debates, security issues, and philosophical concerns. However, developing countries such as China and Korea continue to have active programs of nuclear power. Various renewable energy systems have been developed to drawn on such sources as wind, sunlight, and biomass fuels. While these systems show promise, they have had difficulty making headway, even with significant subsidies, in the face of abundant and low-cost fossil fuel. emissions from fossil fuel combustion continue to grow and threaten to produce notable climate change by modifying the planetary heat balance . While a shift from coal to natural gas may reduce carbon dioxide emissions, emissions of a still more potent greenhouse gas, methane, could result if natural gas energy systems are not leak-free. Numerous environmental hazards, including climate change, acidification of water and soil, and air pollution, stem from our dependence on fossil fuel energy. Alone or together, these significant and accumulating hazards can influence a transition toward sustainability.