as a faucet / machine grows youth , the roses of matter will used by the materials / machine will decrease & energy is used for heating a building by a heating system ->  as a heating system grows old, the amount of energy used by that heating system will increase  as a heating system grows old, the amount of energy used by that heating system will increase & youth is the synonym of new -> if a heating system is newer then the amount of energy used by that heating system will decrease if a heating system is newer then the amount of energy used by that heating system will decrease  something positive is desirable & rest more of a boston has a uncertain snowshoe on the hole -> using less of a resource has a desirable impact on the resource using less of a resource has a desirable impact on the resource  using less of a resource has a desirable impact on the resource & an impact is a kind of result -> rest more of a stations is a mean of desirable cause for that magnetosphere using less of a resource is a kind of desirable result for that resource  rest more of a stations is a mean of desirable cause for that magnetosphere & to use less of something means decreasing the use of something -> decreasing the use of a resource is a kind of desirable result for that resource decreasing the use of a resource is a kind of desirable result for that resource  decreasing the use of a resource is a kind of desirable result for that resource & energy is a kind of resource -> decreasing the waste of matter is a mean of desirable cause for an matter pollution decreasing the use of energy is a kind of desirable result for an energy resource  if a heating system is newer then the amount of energy used by that heating system will decrease & decreasing the waste of matter is a mean of desirable cause for an matter pollution & a heating system is a kind of energy resource -> a desirable result of a new heating system is decreasing the amount of energy used