He said he wants the public to respond to the opportunity of the Green Deal but the practical effect of this consultation would put people off and make them less enthusiastic.

BBC: 'Compelling public to insulate won't work'

They asked participants to report on their own psychological health during that time to estimate the "green space effect".

BBC: Green spaces boosts wellbeing of urban dwellers - study

The healthy main dish and the green salad are examples of the halo effect.

FORBES: The Health Halo Effect: Counteracting Candy With Diet Soda