The Institute of Fundraising has pledged to provide more support to members on when they can refuse donations or step away from partnerships because of environmental concerns.
In a letter to members, Peter Lewis, chief executive of the institute, said "business as usual is not an option" because the climate stakes were higher than ever.
He said the IoF would set up a task group to review its environmental practices as part of an eight-point plan for tackling climate change.
It will also work with the Fundraising Regulator to review any changes needed to the Code of Fundraising Practice on environmental fundraising practices and "embed the climate emergency as a continuing priority in our work", his letter said.
Other commitments included updating the institute's environmental policy for events and conferences.
The institute's board approved the commitments after a round-table event last week involving members and climate experts.
"As fundraisers, we have specific opportunities to make essential change," wrote Lewis. "Whether it’s in the choices we make on how we fundraise, the donations we accept or refuse, or through the engagement we have with millions of people who support and donate to charities, we can be part of the of the change that’s needed.
"Each of our solutions might be different, but one thing is clear: business as usual is not an option."
Lewis urged members to "join us in committing to do our bit" and to contact the institute with any ideas.