Thématique

Changement climatique

Le changement climatique est une réalité tangible. La température moyenne mondiale (à la surface de la terre et des océans), par rapport à l’ère préindustrielle, a déjà connu une augmentation de l’ordre de 1,1 °C. Cette augmentation s’explique par les activités humaines qui émettent des gaz à effet de serre. Elle se traduit par la multiplication et l’augmentation de l’intensité des phénomènes extrêmes : vagues de fortes chaleur, précipitations, sécheresses, etc. Les conséquences du changement climatique présentent un défi majeur pour le vivant. L’objectif est de maintenir cette augmentation, à l’horizon 2100, en dessous de 2 °C et si possible en dessous de 1,5 °C par rapport à l’ère préindustrielle. Les efforts sont attendus à toutes les échelles pour permettre de réduire les émissions, atteindre la neutralité carbone et s’adapter afin de construire des futurs désirables.

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