To avoid such a scenario, Lunt says Angel's project would have to operate at half strength; all of which reinforces his view that the best option is to avoid the need for geo-engineering altogether.

Begin drinking at half strength by diluting with water and reducing the steeping time. Gradually increase the tea strength as your digestive system adjusts.

To study the strength of the metallic micro-lattices the team compressed them until they were half as thick.