Tourists are growing increasingly frustrated with sustainability requirements for travel, going by a survey by booking.com, in findings that tally with recent polling of consumers in other sectors. One in three of the 31,000 people surveyed in 34 countries by the accommodation platform said their choices would not make any difference to “irreversible” climate change. A quarter of respondents said the threat of climate change was “not as severe as people make it out to be” and something that almost 30% were tired of hearing about “all the time.” And while 45% of those asked said they view envir…