Final answer:
Nestle and McDonald's use of more recyclable material in their packaging is a response to environmental concerns, driven by consumer demand for sustainability. Other environmentally focused consumer demands include eco-friendly product labeling and preferences for local, in-season produce. This change is supported by international treaties and regulations aimed at protecting the environment.
Step-by-step explanation:
When companies like Nestle or McDonald's modify their packaging to use more recyclable material, they are responding to environmental concerns. This adjustment can be seen as part of a larger movement, where consumer demand influences corporate practices and industry standards towards sustainability and environmental protection. There are several current consumer demands that are having a similar effect on the natural environment. These include the demand for products with eco-friendly labels such as "tuna caught in a way that keeps dolphins safe" or "products made with wood not taken from rainforests". Furthermore, there is a notable shift towards local produce and in-season fruits and vegetables to reduce carbon emissions from transportation. Moreover, there is growing awareness and concern about the sustainability of sources, health implications, and the impact of highly processed foods. In light of these consumer behaviors, the UN and various countries have enacted treaties and regulations to address environmental issues, further supporting the shift towards environmental consciousness.