Inter-annual variation patterns in the carbon footprint of farmland ecosystems in Guangdong Province, China.

4 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$CS = S - CEF$$\end{document} C S = S - C E F Results Analysis of carbon sources in Guangdong farmland ecosystems under the “dual carbon” target Analysis of inter-annual variation in carbon emissions from farmland ecosystems in Guangdong Guangdong's carbon emissions from farmland ecosystems showed an increasing trend year by year during 2001–2017 (Fig. 1 a), with carbon emissions gradually reaching a peak of 4.153 million t a −1 in 2016 from 3.554 million t a −1 in 2001, but decreasing year by year from 2017 onwards.

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Carbon surplus and footprint showed a decreasing trend year by year.

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