High CO₂ Can Upset the Balance of Trees and Grass In Savannas - What Can Be Done About It
Carbon dioxide (CO₂) is an important resource needed for photosynthesis. Its low availability in the atmosphere has been a limiting factor to plant growth for millennia. Before the industrial revolution, the Earth’s atmosphere had 280 parts per million of CO2. It’s now over 400 parts per million and still rising, predicted to reach about 800 parts per million by the turn of the century.