CAPE TOWN (Reuters) - In South Africa's Franschhoek mountains a helicopter drops off abseilers to cut down invasive pine trees that are choking off water supplies to millions of Cape Town residents ...

The commercial timber plantations at Newlands are of invasive alien pine trees. These spread their seeds en masse into the surrounding indigenous vegetation. Newlands Forest. Cape Town. Source – S ...

The green colour of Earth's forests is not accidental. Plants contain chlorophyll, a pigment that absorbs red and blue wavelengths of sunlight while reflecting green light. This process allows plants ...