Their rapid growth has an important impact on global warming and climate change, which shows in growing temperatures, changed precipitation patterns, shorter winters and more frequent natural disasters.
Njihovo hitro naraščanje vpliva na segrevanje ozračja in spremembe podnebja, kar se kaže v naraščanju povprečne temperature, spreminja se padavinski režim, zime so vedno krajše, naravne nesreče pa vedno bolj pogoste.