The rise of environmental awareness and activism had a significant impact on corporate practices in the Americas by the end of the 20th century. Public pressure and campaigns by environmental groups led to increased scrutiny of corporate environmental practices. This scrutiny pushed companies to adopt more sustainable and environmentally friendly operations to maintain public image and consumer base. The introduction of environmental standards and certifications, such as ISO 14001, along with consumer demand for 'green' products, compelled many corporations to implement environmental management systems, invest in cleaner technologies, and adopt practices like recycling and waste reduction. Corporations began to realise that environmentally responsible behaviour could lead to cost savings and a competitive advantage.

Urban expansion in the late 20th century significantly contributed to environmental challenges in the Americas. The rapid growth of cities led to the overconsumption of resources, increased waste production, and the sprawling development, which often encroached on natural habitats. The demand for housing and infrastructure led to the clearing of forests and green spaces, reducing biodiversity and increasing surface runoff, contributing to flooding and water pollution. Additionally, urban areas became major sources of air pollution due to the concentration of vehicles and industrial activity. The lack of adequate urban planning and infrastructure, particularly in rapidly growing megacities, exacerbated the environmental footprint of urbanisation.

Changes in agricultural practices in the late 20th century had a profound impact on environmental conservation in the Americas. The shift towards intensive agriculture to meet global food demands led to increased use of agrochemicals, such as pesticides and fertilisers, which polluted waterways and degraded soil quality. The drive for agricultural expansion also contributed to deforestation and habitat loss, particularly in regions like the Amazon. However, there was also a growing movement towards sustainable agriculture, which promoted practices such as crop rotation, organic farming, and permaculture. These environmentally conscious methods aimed to reduce agriculture's ecological footprint by enhancing biodiversity, conserving water, and reducing chemical inputs.

Economic policies in the Americas during the 1980s and 1990s, particularly neoliberal reforms that emphasised deregulation and privatisation, had a complex impact on environmental conservation efforts. On the one hand, the push for economic growth often led to the exploitation of natural resources without adequate environmental safeguards, exacerbating issues such as deforestation, pollution, and habitat destruction. On the other hand, economic crises during this period prompted some governments to recognise the importance of sustainable resource management as a long-term economic strategy. Additionally, the emergence of eco-tourism and the green economy offered alternative revenue sources that encouraged the preservation of natural environments, aligning economic incentives with conservation goals.

Indigenous communities played a crucial and increasingly recognised role in conservation efforts across the Americas during the late 20th century. Their deep-rooted knowledge of local ecosystems and sustainable practices proved instrumental in advancing environmental conservation. Indigenous territories began to be seen as vital areas for biodiversity conservation, often showing less deforestation and better-preserved ecosystems than non-indigenous lands. Additionally, the legal affirmation of indigenous land rights was a significant step in protecting vital habitats, as it often prevented large-scale logging and agricultural expansion. Furthermore, indigenous activism brought attention to environmental issues, influencing both national policies and international discourse on environmental protection.