A green-collar worker is a worker who is employed in an environmental sectors of the economy. Environmental green-collar workers (or green jobs) satisfy the demand for green development. Generally, they implement environmentally conscious design, policy, and technology to improve conservation and sustainability. Formal environmental regulations as well as informal social expectations are pushing many firms to seek professionals with expertise with environmental, energy efficiency, and clean renewable energy issues. They often seek to make their output more sustainable, and thus more favorable to public opinion, governmental regulation, and the Earth's ecology. Green collar workers include professionals such as conservation movement workers, environmental consultants, council environmental services/waste management/recycling managers/officers, environmental or biological systems engineers, green building architects, landscape architects, holistic passive solar building designers, solar energy and wind energy engineers and installers, nuclear engineers, green vehicle engineers, "green business" owners, green vehicle, organic farmers, environmental lawyers, ecology educators, and ecotechnology workers, and sales staff working with these services or products. Green collar workers also include vocational or trade-level workers: electricians who install solar panels, plumbers who install solar water heaters, recycling centre/MRF attendants, process managers and collectors, construction workers who build energy-efficient green buildings and wind power farms, construction workers who weatherize buildings to make them more energy efficient, or other workers involved in clean, renewable, sustainable future energy development. There is a growing movement to incorporate social responsibility within the green industries. A sustainable green economy simultaneously values the importance of natural resources and inclusive, equitable, and healthy opportunities for all communities. In the context of the Financial crisis of 2007–2008, many experts now argue that a massive push to develop renewable sources of energy could create millions of new jobs and help the economy recover while simultaneously improving the environment, increasing labour conditions in poor economies, and strengthening energy and food security. Notable uses Of or pertaining to both employment and the environment or environmentalism. 1976, Patrick Heffernan, “Jobs for the Environment — The Coming Green Collar Revolution”, in Jobs and Prices in the West Coast Region: Hearing before the Joint Economic Committee, Congress of the United States, Ninety-Fourth Congress, Second Session, U.S. Government Printing Office, page 134, 1997, Geoff Mulgan, Perri 6 et al., The British Spring: A Manifesto for the Election After Next, Demos, page 26, The United States, Canada, Germany, and Denmark are all generating hundreds of thousands of new 'green collar' jobs, especially for young