Global development has been heavily reliant on the overexploitation of natural resources since the Industrial Revolution. With the extensive use of fossil fuels, deforestation, and other forms of land-use change, anthropogenic activities have contributed to the ever-increasing concentrations of greenhouse gases (GHGs) in the atmosphere, causing global climate change. In response to the worsening global climate change, achieving carbon neutrality by 2050 is the most pressing task on the planet. To this end, it is of utmost importance and a significant challenge to reform the current production systems to reduce GHG emissions and promote the capture of CO
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from the atmosphere. Herein, we review innovative technologies that offer solutions achieving carbon (C) neutrality and sustainable development, including those for renewable energy production, food system transformation, waste valorization, C sink conservation, and C-negative manufacturing. The wealth of knowledge disseminated in this review could inspire the global community and drive the further development of innovative technologies to mitigate climate change and sustainably support human activities.
A configuration for an optical pumped monochromatic terahertz (THz) source operating in a high repetition rate is developed and based on a resonant parametric process within a Fabry-Perot microcavity. Comprehensive analysis of the spectral selection, cavity phase matching, energy-conversion dynamic, and input-output characteristics is provided. Calculations are performed on a Tm 3 -doped fiber laser pumped GaAs sheet. It is indicated that a pump threshold can be scaled down by injection seeding of the signal wave. Efficient THz wave generation (mW level average power) under relatively low pump peak power (65 kW) is predicted.
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