Global change and direct sun near the ecuador increase the temperature of cities whereas forests regulate such temperature. We therefore assessed the structure and above ground biomass of two forest remnants nearby a newly built urbanization in Daule, Ecuador (Daule 1-2). We made n=5 transects (25 m × 4 m) covering 0.05 ha/site, then measured all trees ?2.5 cm dbh (1.3 m above ground level) and compared with other forests studied by Alwyn Gentry. Daule-1 and Daule-2 had 39 and 35 individuals, respectively whereas Gentry found 159 and 216 individuals at Capeira and Esmeraldas. The densities for our n=5 transects (average ± standard error) were smaller for (Daule-1=780±37.42 ind/ha) and (Daule-2=740±40.00 ind/ha) while Capeira and Esmeraldas (n=10 transects for each site) which had (2270±211.37 ind/ha) and (3540±265.50 ind/ha), respectively (ANOVA, P<0.001). The carbon captured was Daule-1=131.6 Mg/ha, Daule-2=111.7 Mg/ha, Daule-1+Daule-2=243.3 Mg/ha likewise Capeira 210.6 Mg / ha and Esmeraldas 181.5 Mg / ha. Such results suggest that forest remnants play an important role for people’s life quality by capturing carbon dioxide and producing oxygen; role they would play better if the forests would have more extensive.