Fighting without a Planet B: how IHL protects the natural environment in armed conflict Format Helen Obregón Gieseken, Legal Adviser, ICRC *Armed conflicts from Kuwait to Vietnam continue to remind us that the environment can be deeply scarred by war, a reality that climate risks now magnify for many dependent communities. But while a certain amount of environmental damage may be considered inherent to war, the destruction must and does have limits.**This post by ICRC legal advisers Vanessa Murphy and Helen Obregón, which launches a series on war, law and the environment co-hosted with the *Conflict and Environment Observatory*, provides an overview of the ICRC's **updated* *Guidelines on the Protection of the Natural Environment in Armed Conflict and sets out measures to accelerate better respect for international humanitarian law (IHL) rules protecting the natural environment.*