To compare England and Croatia fairly on sustainability, it helps to normalize for territory size and population density, because a small country with a low population can appear greener simply due to scale.
Basic context
| Indicator | England | Croatia |
| Area | ~130,300 km² | ~56,600 km² |
| Population | ~57 million | ~3.9 million |
| Population density | ~438 people/km² | ~69 people/km² |
| Net-zero target | Part of UK net-zero by 2050 | Climate neutrality by 2050 through EU framework |
England is much more densely populated, which makes decarbonization harder because transport, housing, industry, and energy demand are much larger per unit of land.
Carbon reduction progress
England (within the UK)
The UK has reduced greenhouse-gas emissions by about 50% from 1990 levels while maintaining economic growth, making it one of the strongest performers among major industrialized economies. The UK is legally committed to net zero by 2050 and has established binding carbon budgets. ([Climate Change Committee][1])
Croatia
Croatia reduced net emissions by about 19.5% between 2005 and 2023. The country is on a trajectory consistent with EU climate-neutrality objectives but has progressed more slowly than the EU average. ([Parlamento Europeu][2])
Advantage: England
Renewable energy
England
The UK has rapidly expanded offshore wind and has largely eliminated coal from electricity generation. Clean electricity deployment is among the country's strongest sustainability achievements. ([Climate Change Committee][1])
Croatia
Croatia already obtains roughly 28% of final energy consumption from renewables, with substantial hydropower and growing wind and solar capacity. Targets aim for over 40% renewable energy by 2030. ([eea.europa.eu][3])
Advantage: Croatia (current renewable share)
Land and population efficiency
A useful sustainability-adjusted measure is:
Sustainability pressure = emissions challenge ÷ available territory per person
Croatia benefits from:
- Lower density
- Larger natural carbon sinks per resident
- More space for renewable deployment
- Lower transport intensity
England must decarbonize:
- A population about 15 times larger
- More intensive infrastructure
- Much higher urban density
When adjusted for population density, England's achievements become more impressive because they were achieved under much more difficult conditions.
Advantage: England
Governance and policy strength
England / UK
- Climate Change Act
- Independent Climate Change Committee
- Legally binding carbon budgets
- Long record of emissions reporting and enforcement
Croatia
- Strong alignment with EU climate policy
- Net-zero objective embedded through national and EU legislation
- More dependent on EU-level policy direction
Advantage: England
Composite sustainability score (normalized)
Using four weighted categories:
| Category | England | Croatia |
| Emissions reduction progress | 9/10 | 6/10 |
| Renewable energy deployment | 8/10/ | 8.5/10 |
| Density-adjusted sustainability | 8.5/10 | 7.5/10 |
| Climate governance | 9.5/10 | 7.5/10 |
Overall normalized score
- England: ~8.8/10 (88%)
- Croatia: ~7.4/10 (74%)
Who is the favorite to reach net zero?
Short answer
England is the favorite.
Although Croatia has a greener starting position due to lower population density and a higher share of renewables, England has:
- Much larger absolute emissions reductions already achieved.
- Stronger climate institutions.
- More mature decarbonization policies.
- Greater investment in low-carbon technologies.
- A proven track record of meeting carbon budgets. ([Climate Change Committee][1])
Estimated probability of reaching net zero by 2050
These are analytical estimates rather than official forecasts:
| Country | Estimated likelihood |
| England (UK framework) | ~75–85% |
| Croatia | ~60–70% |
Verdict: Croatia currently appears more naturally sustainable per capita and per unit of land, but after adjusting for territory size, population density, governance, and decarbonization progress, England emerges as the stronger overall performer and the more likely country to achieve the 2050 zero-carbon goal.
- : https://www.theccc.org.uk/publication/progress-in-reducing-emissions-2025-report-to-parliament/?utm_source=chatgpt.com "Progress in reducing emissions - 2025 report to Parliament - Climate Change Committee"
- : https://www.europarl.europa.eu/thinktank/en/document/EPRS_BRI%282025%29769561?utm_source=chatgpt.com "Croatia's climate action strategy | Think Tank | European Parliament"
- : https://www.eea.europa.eu/en/europe-environment-2025/countries/croatia/renewable-energy-sources?utm_source=chatgpt.com "Share of renewable energy in final energy consumption | Croatia | Europe's environment 2025 (EEA)"
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