Ключевые слова: balance, board, carbon, chalkboard, change, climate, co2, coal, concept, conservation, damage, decrease, deforestation, degradation, destroy, dioxide, ecological, ecology, effect, emission, energy, environment, environmental, forest, fossil, fuels, gas, global, greenhouse, index, issues, nature, neutral, neutrality, oil, overload, pollution, preservation, problems, removal, risk, strike, temperature, tree, trunk, written,