(26)The technical screening criteria for determining whether the economic activities that contribute substantially to one of the environmental objectives cause no significant harm to any of the other environmental objectives should aim at ensuring that contribution to one of the environmental objectives is not made at the expense of other environmental objectives. The ‘do no significant harm’ criteria play therefore an essential role in ensuring the environmental integrity of the classification of environmentally sustainable activities. The ‘do no significant harm’ criteria for a given environmental objective should be specified for those activities that present a risk of causing significant harm to that objective. Those criteria should take into account and build upon the relevant requirements of existing Union law.