Labour is the juncture, the intersection of almost everything. It is where power relations, gender dynamics, migration regimes, and the rights of humans and nature are either reinforced or challenged. Individuals and groups are excluded or included, exploited or become subjects of their own actions. This intersection also determines the answer to the question: Who bears the costs and who points the way out of the climate catastrophe? According to sociologist Simon Schaupp, the parallel between the exploitation of people and nature becomes uniquely clear on construction sites. The construction industry is one of the most climate-damaging sectors of the economy. At the same time, construction workers suffer from the climate crisis. By working overtime, they are expected to compensate for the loss of productivity caused by heat stress and climate fluctuations. Their embodied environmental knowledge and political attitudes are at first glance often incompatible with the knowledge and strategies of climate activists. This paper discusses the issue from the following perspective: How can alliances be formed that support construction workers in their labor struggles - for reduced working hours or better protection during heat waves - while at the same time advancing transformative policies, as demanded by the climate justice movement? Such alliances require time, relationship building, and changed attitudes. They also require a rethinking of climate awareness, solidarity, and work. This practice gives rise to hope.