Industrialization, ICT, and China’s environmental transition toward carbon neutrality: evidence from wavelet cross-quantile regression

Key findings from this study

• The study found that industrialization and ICT expansion consistently increase CO2 emissions, with larger effects at higher emission levels and stronger impacts over longer time horizons.
• The researchers demonstrate that financial development and renewable energy consumption reduce emissions, particularly in medium and long-term periods.
• The authors report that heterogeneous effects across emission quantiles indicate tailored policy responses are necessary rather than uniform carbon reduction strategies.

Overview

The study examines how industrialization and information and communication technology (ICT) development affect CO2 emissions in China using quarterly data from 1990 to 2024. Wavelet cross-quantile regression captures nonlinear relationships across different emission levels and temporal scales. The analysis incorporates financial development and renewable energy consumption as additional variables influencing emissions trajectories.

Methods and approach

Wavelet cross-quantile regression methodology enabled detection of heterogeneous effects across emission quantiles and time horizons. The technique accommodates nonlinear dynamics absent from conventional regression approaches. Analysis utilized quarterly observations spanning 35 years, permitting examination of evolving relationships between variables and environmental outcomes.

Results

Industrialization and ICT expansion demonstrate positive, persistent effects on CO2 emissions, with magnitudes increasing at higher emission quantiles and strengthening over longer time horizons. Financial development reduces emissions in medium and long-term periods, suggesting that maturation of financial systems supports decarbonization pathways. Renewable energy consumption consistently mitigates emissions across all specifications, with long-run effects exceeding short-term impacts.

The heterogeneity identified across quantiles indicates that high-emission scenarios respond differently to policy interventions than baseline conditions. Industrialization's emissions contribution proves more pronounced in the long run, reflecting the lag between structural economic shifts and environmental adjustment. ICT development exhibits similar temporal dynamics, suggesting that infrastructure deployment effects accumulate over extended periods.

Implications

China's carbon neutrality targets necessitate coordinated policy frameworks addressing multiple transmission channels. Green financial mechanisms require institutional design that systematically directs capital toward low-carbon sectors while constraining fossil fuel investments. Energy-intensive digital infrastructure demands regulatory oversight to decouple ICT expansion from emissions growth.

Rapid renewable energy integration into industrial and ICT sectors emerges as critical for achieving sustainability objectives. The stronger long-run effects of renewable energy underscore the importance of sustained investment rather than short-term interventions. Sectoral coordination becomes essential as industrialization and digitalization proceed simultaneously, requiring complementary decarbonization pathways rather than sector-specific approaches alone.

Scope and limitations

This summary is based on the study abstract and available metadata. It does not include a full analysis of the complete paper, supplementary materials, or underlying datasets unless explicitly stated. Findings should be interpreted in the context of the original publication.